GB1176780A - Improvements in Static No-Break Power Supplies. - Google Patents
Improvements in Static No-Break Power Supplies.Info
- Publication number
- GB1176780A GB1176780A GB5277468A GB5277468A GB1176780A GB 1176780 A GB1176780 A GB 1176780A GB 5277468 A GB5277468 A GB 5277468A GB 5277468 A GB5277468 A GB 5277468A GB 1176780 A GB1176780 A GB 1176780A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- battery
- supply
- mains
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
1,176,780. Stand-by supply systems. STANDARD TELEPHONES & CABLES Ltd. 7 Nov., 1968, No. 52774/68. Heading H2H. Supply system includes a control circuit which causes a main supply to charge a battery under normal conditions, and connects the battery to an inverter to replace the main supply on failure of the latter. The supply is regulated by a constant voltage transformer. In the circuit shown in Fig. 1, a load 7 is normally fed by mains supply 6 which is connected to the saturated resonant tank circuit of transformer T1. If the mains should fail, the transformer is energized from a battery 1 through a parallel inverter 2. In normal operation, the mains voltage is sufficient to close contacts RLA-1 and RLA-2 so as to supply current to the transformer and also provide a signal to the control circuit 8. The control also receives a signal from the battery, and the charging current fed to the battery using the inverter 2 is adjusted according to the existing state of charge by altering the phase difference of the mains and inverter output. The control circuit 8, Fig. 2 (not shown), includes a unijunction transistor oscillator which determines the output frequency, a bi-stable pulse circuit for providing thyristor gating pulses, a synchronizing circuit, a phaseshifting circuit, and a reference circuit. Modifications, Figs. 3-5 (not shown), include the replacement of switch RLA-1 by a thyristor device, and an alternative control circuit which includes a thermistor for indirectly sensing the battery voltage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5277468A GB1176780A (en) | 1968-11-07 | 1968-11-07 | Improvements in Static No-Break Power Supplies. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5277468A GB1176780A (en) | 1968-11-07 | 1968-11-07 | Improvements in Static No-Break Power Supplies. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1176780A true GB1176780A (en) | 1970-01-07 |
Family
ID=10465243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5277468A Expired GB1176780A (en) | 1968-11-07 | 1968-11-07 | Improvements in Static No-Break Power Supplies. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1176780A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2212682A1 (en) * | 1972-12-29 | 1974-07-26 | Backer Adrien Ets | |
EP0019932A1 (en) * | 1979-06-04 | 1980-12-10 | Tab Products Company | Continuous power source with bi-directional converter |
GB2145296A (en) * | 1983-08-16 | 1985-03-20 | Meidensha Electric Mfg Co Ltd | Power supply equipment proof against interruption of service |
-
1968
- 1968-11-07 GB GB5277468A patent/GB1176780A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2212682A1 (en) * | 1972-12-29 | 1974-07-26 | Backer Adrien Ets | |
EP0019932A1 (en) * | 1979-06-04 | 1980-12-10 | Tab Products Company | Continuous power source with bi-directional converter |
GB2145296A (en) * | 1983-08-16 | 1985-03-20 | Meidensha Electric Mfg Co Ltd | Power supply equipment proof against interruption of service |
US4604530A (en) * | 1983-08-16 | 1986-08-05 | Kabushiki Kaisha Meidensha | Power supply equipment backup system for interruption of service |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1487049A (en) | Uninterruptable power supply | |
GB1030632A (en) | Apparatus for and method of zero switching | |
US3949403A (en) | Remote power control apparatus | |
GB1205707A (en) | An ac source switching system | |
GB1021169A (en) | Improvements in or relating to electric power supply apparatus for deriving a relatively high d.c. voltage from a source of relatively low d.c. voltage | |
US3037158A (en) | Protective recycling circuit for static inverter | |
GB1088210A (en) | Electrical appliance with a power control circuit | |
GB1017405A (en) | Electrical control system | |
GB1430489A (en) | Apparatus for connecting in parallel a power supply and a static inverter and a logic device for use in the apparatus | |
GB1176780A (en) | Improvements in Static No-Break Power Supplies. | |
US3703644A (en) | Synchronizing device | |
US4112318A (en) | Condition control system utilizing digital logic | |
GB1144480A (en) | Constant electrical power regulator | |
US2882456A (en) | Safety control system | |
GB1523322A (en) | Dc to ac inverter | |
GB1143733A (en) | Improvements in or relating to dc-ac converters having a resonant circuit | |
GB1349870A (en) | Regulated electrical power supply | |
ES348595A1 (en) | A-c voltage regulator | |
GB1067859A (en) | A control device | |
GB1358854A (en) | Control circuit for ac supply circuit | |
GB1276964A (en) | Improvements in or relating to no-break power supplies | |
GB1146220A (en) | An emergency power supply | |
GB1202410A (en) | Regulated direct voltage to direct voltage power supply | |
GB1166695A (en) | D.C. Motor Speed Control Systems | |
GB808768A (en) | Improvements in or relating to circuits for generating stabilized pulsatory voltages |